CVE-2020-13974
HIGHCVSS 7.8/10EPSS 0.57%
Last modified
CVE-2020-13974 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An issue was discovered in the Linux kernel 4.4 through 5.7.1. drivers/tty/vt/keyboard.c has an integer overflow if k_ascii is called several times in a row, aka CID-b86dab054059. EPSS estimates a 0.57% chance of exploitation in the next 30 days.
Description
An issue was discovered in the Linux kernel 4.4 through 5.7.1. drivers/tty/vt/keyboard.c has an integer overflow if k_ascii is called several times in a row, aka CID-b86dab054059. NOTE: Members in the community argue that the integer overflow does not lead to a security issue in this case.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 4.4.227 |
| Linux | Linux Kernel | >= 4.5, < 4.9.227 |
| Linux | Linux Kernel | >= 4.10, < 4.14.184 |
| Linux | Linux Kernel | >= 4.15, < 4.19.128 |
| Linux | Linux Kernel | >= 4.20, < 5.4.46 |
| Linux | Linux Kernel | >= 5.5, < 5.6.18 |
| Linux | Linux Kernel | >= 5.7, < 5.7.2 |
| Debian | Debian Linux | 9.0 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 20.04 |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00019.htmlMailing List, Third Party Advisory
- https://lkml.org/lkml/2020/3/22/482Exploit, Vendor Advisory
- https://usn.ubuntu.com/4427-1/Third Party Advisory
- https://usn.ubuntu.com/4439-1/Third Party Advisory
- https://usn.ubuntu.com/4440-1/Third Party Advisory
- https://usn.ubuntu.com/4483-1/Third Party Advisory
- https://usn.ubuntu.com/4485-1/Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00019.htmlMailing List, Third Party Advisory
- https://lkml.org/lkml/2020/3/22/482Exploit, Vendor Advisory
- https://usn.ubuntu.com/4427-1/Third Party Advisory
- https://usn.ubuntu.com/4439-1/Third Party Advisory
- https://usn.ubuntu.com/4440-1/Third Party Advisory
- https://usn.ubuntu.com/4483-1/Third Party Advisory
- https://usn.ubuntu.com/4485-1/Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-13974?
An issue was discovered in the Linux kernel 4.4 through 5.7.1. drivers/tty/vt/keyboard.c has an integer overflow if k_ascii is called several times in a row, aka CID-b86dab054059. NOTE: Members in the community argue that the integer overflow does not lead to a security issue in this case.
How severe is CVE-2020-13974?
CVE-2020-13974 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.
How do I fix CVE-2020-13974?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2020
- CVE-2020-13969CRK Business Platform <= 2019.1 allows reflected XSS via err…6.1
- CVE-2020-1397An information disclosure vulnerability exists in Windows wh…6.5
- CVE-2020-13970Shopware before 6.2.3 is vulnerable to a Server-Side Request…8.8
- CVE-2020-13971In Shopware before 6.2.3, authenticated users are allowed to…5.4
- CVE-2020-13972Enghouse Web Chat 6.2.284.34 allows XSS. When one enters the…6.1
- CVE-2020-13973OWASP json-sanitizer before 1.2.1 allows XSS. An attacker wh…6.1
- CVE-2020-13976An issue was discovered in DD-WRT through 16214. The Diagnos…8.8
- CVE-2020-13977Nagios 4.4.5 allows an attacker, who already has administrat…4.9
- CVE-2020-13978Monstra CMS 3.0.4 allows an attacker, who already has admini…7.2
- CVE-2020-1398An elevation of privilege vulnerability exists when Windows …6.8
- CVE-2020-13980OpenCart 3.0.3.3 allows remote authenticated users to conduc…4.8
- CVE-2020-13983Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
Are you affected by CVE-2020-13974?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST